| TBB-REVEALED ANNUAL CYCLE FEATURES OF TROPICAL LFO |
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| 作者姓名： | 智协飞 陈旭红 田华 |
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| 作者单位： | Nanjing Institute of Meteorology Nanjing 210044，Nanjing Institute of Meteorology，Nanjing 210044，Nanjing Institute of Meteorology，Nanjing 210044 |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China. |
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| 摘 要： | In the context of 1980—1992 JMA(Japan Meteorological Agency)GMS TBB gridded dataset,study is undertaken of annual cycle features of FFT-derived window power spectrum averaged overthe record length,with localized space/time characteristics of low-frequency oscillation(LFO)inthe tropical atmosphere investigated alongside possible causes.It turns out that the LFO takes onsurprisingly noticeable annual cycle features marked by a wider variable range of the LFO periodsover northern tropics than the southern counterpart and equatorial vicinity.In addition,on thewhole,the signals are more intense in the Northern Hemisphere during summer/autumn and atequatorial/southern latitudes when northern winter/spring occur as well.Also,not all thesefeatures are identical for different segments at the same latitudes,displaying signatures on a localbasis,and the spatial/temporal locality can be qualitatively interpreted in terms of nonlinearinteraction between tropical waves,and modulation of diabatic heating on the LFO periods.
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TBB-REVEALED ANNUAL CYCLE FEATURES OF TROPICAL LFO |
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| Zhi Xiefei Chen Xuhong Tian Hua Nanjing Institute of Meteorology,Nanjing.TBB-REVEALED ANNUAL CYCLE FEATURES OF TROPICAL LFO[J].Acta Meteorologica Sinica,1997(4). |
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| Authors: | Zhi Xiefei Chen Xuhong Tian Hua Nanjing Institute of Meteorology Nanjing |
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| Institution: | Zhi Xiefei Chen Xuhong Tian Hua Nanjing Institute of Meteorology,Nanjing 210044 |
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| Abstract: | |
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| Keywords: | TBB(cloud-top blackbody radiation temperature) low frequency oscillaton (LFO) annual cycle feature |
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